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      06-10-2014, 02:26 PM   #8
biz77
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Drives: 2021 X3 M40i
Join Date: Aug 2010
Location: Spokane, WA

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Quote:
Originally Posted by mko9 View Post
Interesting, but from the dyno graph it doesn't really appear to do anything until around 4750rpm.
You really can't have your cake and eat it too when upgrading to larger turbochargers. When you start going bigger, you must make some sacrifices in low-end response to gain top-end power.

Have you ever driven or ridden in a very high (500+) horsepower 4-cylinder turbocharged car? If you are not in the right gear with the revs up, a stock Honda Civic will show you tail lights. Even the big single turbo N54-powered cars making 600-700WHP don't really start moving until well past 3,000 RPM. It doesn't stop these cars from running 130+mph in 1/4 mile or under 7 seconds from 60-130mph. You just have to be in the right gear to take advantage of the power band.

This upgrade is very mild and the fact that nothing is lost below 4,500 RPM while picking up 40-50WHP up top is actually quite nice.
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